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CVE-2026-40250

OpenEXR has integer overflow in DWA decoder outBufferEnd pointer arithmetic (missed variant of CVE-2026-34589)

Published: Apr 21, 2026Updated: Apr 22, 2026 Sources: CVE List NVDCWE-190
7.1HIGH
NVD MITRE
EPSS Score
0.4%
Top 63.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Workaround Only
Self-Check
OpenVAS

Description

OpenEXR provides the specification and reference implementation of the EXR file format, an image storage format for the motion picture industry. In versions 3.4.0 through 3.4.9, 3.3.0 through 3.3.9, and 3.2.0 through 3.2.7, `internal_dwa_compressor.h:1040` performs `chan->width * chan->bytes_per_element` in `int32` arithmetic without a `(size_t)` cast. This is the same overflow pattern fixed in other decoders by CVE-2026-34589/34588/34544, but this line was missed. Versions 3.4.10, 3.3.10, and 3.2.8 contain a fix that addresses `internal_dwa_compressor.h:1040`.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:NI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-190

Affected Products

openexr
oss-projectaka open exr
openexrLibraryLibrary
OSS Libraries / generic-library
AcademySoftwareFoundation
oss-project·USaka openexr, openimageio, materialx
openexrLibrary
OSS Libraries / generic-library

Exploitability

Workaround Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Initial Access
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References

https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.2.8
github.com
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.3.10
github.com
https://github.com/AcademySoftwareFoundation/openexr/releases/tag/v3.4.10
github.com
and 1 more references View all →

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